Locking device for camera shutteroperating members



G. WAHNISH Sept. 19, 1933.

LOCKING DEVICE FOR CAMERA SHUTTER OPERATING MEMBERS Filed May 24, 1952 INVENTOR 650/?65 MHN/sh' BY ATTORNEY Patented Sept. 19, 1933 1,927,427

UNITED STATES PATENT OFFICE LOOKING DEVICE FOR CAMERA SHUTTER- OPERATING MEMBERS George Wahnish, New York, N. Y. Application May 24, 1932. Serial No. 613,171

2 Claims. (01. 95 32 The invention relates to photographic caming distances between the said film-wind 30 of eras, and more particularly to cameras of the type the camera and the usual shutter-operating memutilizing a film roll and embodying means for ber or finger piece 31. Thus, a plate 32 is mountwinding the film after each exposure upon a ed to oscillate about the optical axis of the camsuitable take-up spool. In the operation of camera, for example, upon its shutter barrel, and is 60 eras thus utilizing a film roll, it frequently ocspring-drawn by means of the spring 33, for excurs that the operator neglects to advance the ample, in a clockwise direction toward a stop film after an exposure to provide an unexposed such as is provided by the shouldered screw 34 portion, with the result that a double-exposure securing the dial plate 35 to the shutter mount is made upon the originally exposed film portion. 36 and between which and the said plate the 5 The present invention has for an object the plate 32 is designed to oscillate.

provision of means in connection with the film- The plate 32 is provided, furthermore, with a exposing mechanism whereby such double-expomore or less radially extending finger 3'7 in sure will be rendered impossible. juxtaposed relationship to the finger piece 31 for Another object of the invention resides in the operating the shutter of the camera; and this provision of means of this nature suitable for use finger piece is designed to contact with the said in connection with a camera of adjustable focus. radially extending finger 3'7 in the taking of a Still another object of the invention resides p ctu e p ss g Said finger piece) and to ride in the provision of a shutter-locking device which beyond the same as indicated in Fig. 3 of the 2 will permit of only one operation of the shutterdrawing. The yielding of spring 33 permits this operating member of the camera until a sucaction and at the same time the spring returns ceeding unexposed film portion has again been the plate 32 to its normal position and causes advanced into position. said finger piece to be locked behind the finger A still further object of the invention is to 37 to render the camera inoperative forv further 25 admit of temporarily rendering the shutter-lockexposures. ing device inoperative, as when making time or To effect the release of the finger piece 31, a bulb exposures. further finger 40 is arranged to project more or In carrying out the invention, means are proless radially from the said plate and to be envided for effecting engagement with the usual gaged by means operated from the rotation of the 30 shutter-operating member of the camera and film-wind 30 for the purpose of oscillating said for becoming so placed in relation to said memplate in a counterclockwise direction. This causes her, during its operation to effect an exposure the finger 37 to clear the finger piece 31 which of a film portion, that the said shutter-operating returns to its normal position for further exmember may not again be moved until the film- P0511113, being p d in the usual manner to 35 advancing mechanism has been actuated to adreset the shutter mechanism, as is well under- Vance a further film portion. stood.

The nature of the invention, however, will best For effecting the movement of this plate as be understood when described in connection with aforesaid, the finger 4 s arranged o b engaged the accompanying drawing, in which: by the movable projecting end 41 of a Bowden 40 Fig. 1 is a fragmentary front elevation, and 0ab1e,the other and inner end being oved from Fig. 2 a similar end elevation illustrating a camera the fi m W nd 30 th u engagement y t atof the folding type and of adjustable focus and ter With a reciprocable IOd 42 slidably mounted equipped with the device for locking its shutterat the d Of the Case 43 of the camera and havoperating member 7 ing a lateral extension 44 for engagement with the 45 Fig. 3 is a fragmentary front elevation illussaid inner end of the cable. Moreover, a spring trating the position of the locking device and 45 coiled about said inner end of the cable is deshutter-operating member after an exposure and signed to normally urge the same and attached prior to the advance of a new film portion. slidable extension 44 in a direction toward the Referring to the drawing, there is disclosed film-wind 30. 50 a camera of the adjustable-focus type and em- Thus, as said film-wind is rotated for advancboclying the usual means for advancing a filming a film portion into position, the cable will be strip therethrough for exposure of successive poractuated and through its projecting end 41 will tions, the film being advanced by a film-wind serve to oscillate plate 32 as a result of the enmember 30 and in accordance with the invention, gagement with its finger 40, so that the shutter 5 provision is made for accommodating the changmay again be operated for exposure of the newly presented film portion. For time and bulb exposures, the time and bulb set finger 46 will, when moved to the respective dial positions for time or bulb, engage the finger 40 to move plate 32 counterclockwise and thereby finger 37 to a position to cause it to clear the finger piece 31 and permit it to operate freely.

By the hereinbefore described expedients, double-exposure of a film portion is rendered impossible, and, moreover, the locking mechanism may be utilized to insure against accidental opera- 7 member, and means actuated by the film-wind for engaging the other finger of said oscillatable member to release the shutter-operating member from the locking engagement with said firstnamed finger.

2. The combination with a rollfilm camera shutter-operating member and the film-wind of the camera; of a spring-urged oscillatable member having a pair of radially extending fingers, the one finger being adapted for engagement with the said shutter-operating member and actuated by movement of the same for location relatively thereto to block further operation of said shutter member, a Bowden cable having a movable end adapted for engagement with the other finger of said oscillatable member, and reciprocable means secured to the opposite end of said cable and spring-urged toward the film-wind for engagement therewith to move the said other finger and thereby said oscillatable member to disengage the first-named finger and the shutter-operating means.

GEORGE WAHNISH. 

